Q
My buds are showing slight bud rot, what now?
A
Remove affected buds immediately, improve airflow, and apply a targeted organic anti-fungal treatment.
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- Reliable yields, bright citrus lift — bred for UK conditions
Critical Jack
Feminised (regular and autoflower variants available)
Critical Jack is a balanced hybrid offering resinous buds and citrus-driven aromas suited to UK growers.
Why choose Critical Jack?
- High yields from a compact, manageable plant
- Citrus and pine aroma with strong resin production
- Performs well in amended soils with careful moisture control
THC |
18–22% |
CBD |
<1% |
Lineage |
Critical Mass x Jack Herer |
Genotype |
Balanced hybrid (slightly Indica) |
Difficulty |
Intermediate |
Flowering |
8–9 weeks |
Height |
Medium (0.8–1.5 m outdoors) |
Yield |
Indoor: 400–500 g/m²; Outdoor: up to 600 g/plant |
Taste |
Citrus, Earthy, Pine |
Seed Type |
Feminised (regular and autoflower variants available) |
Climate |
Wet Welsh valley climate (cool, humid) |
Effects |
Uplifting cerebral buzz, Relaxed body effect, Creative focus |
Environment |
Indoor and outdoor |
About Critical Jack
Critical Jack is a balanced hybrid that combines the yield of Critical Mass with the terpene clarity of Jack Herer to produce dense, aromatic buds. It suits growers seeking a reliable mid-season variety with tangible yields and a bright, citrus-led smoke. In wet, cool UK conditions it rewards attentive canopy and moisture management and performs well both indoors and outdoors when given good soil and airflow. Expect a daytime-capable high that eases into relaxed, body-oriented effects.
Grow Difficulty:
Growing Critical Jack in a wet Welsh valley climate requires strict humidity control and vigilant mould prevention. These factors place it at an intermediate difficulty for outdoor growers who must manage airflow and drainage.
Flowering Time:
Indoor flowering finishes in about eight to nine weeks. Outdoor crops are usually ready by late September to early October in the UK.
Yield:
Yields are generous for a compact plant with indoor runs commonly reaching 400–500 g/m². Outdoors, well-managed plants can produce up to around 600 g each.
Height:
Plants develop a medium-height, bushy structure suited to SCROG or topping techniques. Expect 0.8–1.5 metres outdoors depending on training and light.
Environment:
Indoors, Critical Jack responds well to controlled environments and standard training methods. Outdoors in Tyrone the plant benefits from sheltered sites to avoid prolonged wetting and wind damage.
Climate:
In Tyrone the wet Welsh valley climate makes drainage, raised beds and canopy management essential to prevent rot. Growers in Tyrone should plan for extra ventilation and preventative mould treatments to protect the crop.
Frequently Asked Questions
Common questions about this strain, covering growth, effects, and suitability for UK conditions.
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Choose seed quantity
Selected:
5 Seeds
£8.00 / seed • You save £13.33
100% Satisfaction Guarantee • Secured Payments